Posted on May 17, 2011 at 13:58Firstly a terminology quibble. CMSIS (Cortex Microcontroller Software Interface Standard ) refers to the ARM part of the library. The peripheral stuff is unique to ST.
The Standard Peripheral library Documentation leaves a lot to be desired and probably everyone here agrees with that.However it is what it is so you still have to read the
http://www.st.com/mcu/files/mcu/1221142709.pdf
to understand the peripherals and how they work.
Personally I prefer to use the library most of the time but I don't need to toggle port pins at 20MHz etc so it works fine for me. However your mileage may vary.
